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Key information

The largest of the harriers, the marsh harrier can be recognised by its long tail and light flight with wings held in a shallow 'V'. It is distinguishable from other harriers by its larger size, heavier build, broader wings and absence of white on the rump. Females are larger than males and have obvious creamy heads.

Its future in the UK is now more secure than at any time during the last century, but historical declines and subsequent recovery means it is an Amber List species. Marsh harriers are a Schedule 1 listed bird on The Wildlife and Countryside Act.

What they eat:

Small birds and mammals.

Measurements:

Length:

48-56cm

Wingspan:

115-130cm

Weight:

400-660g (male); 540-800g (female)

Population:

UK breeding:

400 pairs

Identifying features:

This bird species has different identifying features depending on sex/age/season.

Marsh harrier (male)

Feather colour:
BlackBrownCream/buffGreyWhite

Leg colour:
Yellow

Beak:
BlackMedium lengthHookedChunky

Natural habitats:
FarmlandMarine and intertidalWetland

Marsh harrier (female/juvenile)

Feather colour:
BlackBrownCream/buff

Leg colour:
Yellow

Beak:
BlackMedium lengthHookedChunky

Natural habitats:
FarmlandMarine and intertidalWetland

Similar birds:

Where and when to see them

Marsh harriers are mainly found in eastern and south-east England, with some in the north-west, south-west and Scotland. They can be seen over reedbeds and marshes, as well as farmland near wetlands. Marsh harriers can be seen at: Elmley, Kent; Leighton Moss, Lancashire; Minsmere, Suffolk; Titchwell Marsh and Strumpshaw Fen, Norfolk; Ouse and Nene Washes, Cambs and Blacktoft Sands, Yorkshire. Other nature reserves with marsh harriers include Stodmarsh, Kent and Wicken Fen, Cambridgeshire.

* This map is intended as a guide. It shows general distribution rather than detailed, localised populations.

Resident

Passage

Summer

Winter

Marsh harriers are usually back in their breeding areas by April and leave during September and October, although a growing number - usually the females - are staying all year round.